.mytabbar{
    position: fixed;
    bottom: 0;
    width: 100%;
    border-top: 1px solid #ccc;
}
.adm-tab-bar-item:nth-child(4){
    height: .4rem;
    background-color:orange;
    border-radius: 30px 0 0 30px;
    margin-top: 0.05rem;
    color: #fff;
}
.adm-tab-bar-item:nth-child(5){
    height: .4rem;
    width: 30px;
    background-color:red;
    border-radius: 0 30px 30px 0;
    margin-top: 0.05rem;
    color: #fff;
}